Minute pests, commonly called clover mites, can invade your home in the spring. Recognizing them is fairly simple ; they are orange-brown, reaching just about 1/8 inch. Look for them clustering on walls https://pestcontrolbros.com/blog-post.php?slug=clover-mites-what-they-are-where-they-come-from-and-how-to-get-rid-of-them